You may notice the new outfit worn by Steve Rogers. There was always going to be a certain amount of redesign going on for the new film. Though for me it signifies something of a theme that I feel to be running through the trailer.
Think back to Captain America: The First Avenger with Rogers sporting the red, white and blue of his nation's flag. Some found the film as a whole jingoistic, and whilst I'm one for finding patriotic chest beating in films nauseating (the flag against the building in The Amazing Spiderman being a prime example), if you can't do it in CAPTAIN AMERICA when can you?!
Now back to The Winter Soldier trailer and Rogers' new outfit. Gone are the patriotic colours, replaced by more muted, darker colours. Only the silver star remaining across his chest. We also have Robert Redford's character telling Rogers, "to build a better world, sometimes means tearing the old one down...and that makes enemies". Immediately following this we cut to Nick Fury walking into a room. This may well be a completely different scene, but add this together with several shots of Rogers looking pensive, thoughtful and uttering the line "I joined S.H.I.E.L.D to protect people" and it looks like you have Rogers considering who his enemies really are? We know that Rogers had concerns with S.H.I.E.L.D and their development of Hydra weapons in Avengers Assemble, so we already have an element of distrust there. Gone are the days of World War 2 when it was everyone vs. The Nazis. The Winter Soldier I hope gives us chance to further explore the complex modern day world of technology and terrorism that Rogers now finds himself in. A time when the enemy isn't so clearly defined. All of this will ultimately bring to the fore the characteristic of Captain America that I love best. He's just a man. He remembers what it's like to be the little guy, and that's who he's trying to protect, regardless of who that puts him up against.
We haven't even said anything about The Winter Soldier himself yet! It remains to be seen how true to the Winter Soldier storyline they keep. The basic idea is straight forward enough to not necessarily need much tinkering with. If you keep watching until the very end of the trailer, you'll see one thing's for certain. The Winter Soldier is a bad ass. In pursuit of The Winter Soldier, Captain America throws himself out of a window onto a rooftop. He then follows it up with his signature shield throw, and The Winter Soldier simply turns round and catches it out of the air.
April 2014 can't come quick enough...